root: fix dev build version being invalid semver (#12472)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/__init__.py

@@ -16,5 +16,5 @@ def get_full_version() -> str:
     """Get full version, with build hash appended"""
     version = __version__
     if (build_hash := get_build_hash()) != "":
-        version += "." + build_hash
+        return f"{version}+{build_hash}"
     return version

internal/constants/constants.go

@@ -16,7 +16,7 @@ func BUILD(def string) string {
 func FullVersion() string {
 	ver := VERSION
 	if b := BUILD(""); b != "" {
-		ver = fmt.Sprintf("%s.%s", ver, b)
+		return fmt.Sprintf("%s+%s", ver, b)
 	}
 	return ver
 }